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Author Topic: faceting  (Read 381 times)

swirly

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faceting
« on: March 25, 2019, 03:10:17 PM »
ive been faceting for a long time and on occasion i still have trouble polishing quartz. im wondering if someone on the forum could give me some idears on how to get a good polish on quartz.thanks.

mehoose

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Re: faceting
« Reply #1 on: March 25, 2019, 04:48:24 PM »
Sometimes going back to the basics can help..like the good old perspex lap that's been scored and a 'just right dose' of cerium slurry, the pink stuff you mix as opposed to a stick.Thinking back that lap gave a darn good polish on both quartz and topaz..trying to think if it was cerium or alox for synth spinel as well or if DD used a diamond slurry for that... i didn't do a spinel and she won't remember either. ;)
Keep em comin!!!

swirly

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Re: faceting
« Reply #2 on: March 25, 2019, 08:11:00 PM »
ok ill try that,thanks.

MALACHI

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Re: faceting
« Reply #3 on: March 25, 2019, 08:58:18 PM »
Hi Swirly. I've found that Cerium Oxide does a great job of putting a nice polish on quartz. At my club, we use two types, which are a tan or white colour. Apparently the white is 2 microns and gives an even better polish than the regular tan Cerium. I hope this helps.
PS. I'll be sending you a pm soon on my latest trip. Cheers!  ;)

swirly

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Re: faceting
« Reply #4 on: March 26, 2019, 08:06:54 AM »
thanks for that hope you had a good trip

FlashGP

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Re: faceting
« Reply #5 on: March 27, 2019, 08:45:28 PM »
Ho Swirly,

I have a darkside lap and have zirconium oxide, cerium oxide and Aluminium oxide batt sticks.

My goto polish is the zirconium oxide, which is specufically made fir quartz.

The Darkside takes very little polish, too much and it scratches.

I draw a circle with the batt stick near the inside of thd lap, drip water onto the line at 1 to 2 drips per second and polish with what flishes accross the lap.

The lap turns at faster than 200 rpm because I can't count the timing mark I drew on the nut that holds the lap on.  My Facetron doesn't turn slowly like the Aussie machines.

Cerium slurries dont work for me   I think my lap turns too fast and the cerium too variable in size  the stuff sold at gemshows doesn't say how many micron.  Makky mentioned 2 micron earlier, to me that is a prepolish.  The Linde A Lightning Lap I had was 0.3 micron, about the same as 60k diamond, so I am told.

Regards
Gordon.
Yours Sincerely
Flash (Gordon)

Bucket

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Re: faceting
« Reply #6 on: March 29, 2019, 12:49:33 PM »
Swirly I may as well throw my two bobs worth. I facet a lot of quartz and to date, haven't had a problem. I use a pewter lap with white cerium oxide exclusively. I too have a Facetron that does slow down, although I've never measured the actual speed, I use it on the slowest possible setting. Pre polish is done with a very well worn 1200 lap only. Whilst I know that others use 3000 or even 8000 for pre polish, I find this old lap works for me. I have used a dark side lap with good results, again with cerium oxide, but after I accidentally dropped the quill on it and lightly gouged it, I seem to get really light scratches when using it now.
Common sense isn't exactly common

swirly

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Re: faceting
« Reply #7 on: March 29, 2019, 03:10:30 PM »
thanks for that, ill will give it a go and let you no what happens.

FlashGP

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Re: faceting
« Reply #8 on: March 30, 2019, 06:37:18 PM »
Hi Bucket,


you can sand the Darkside flat again, or Andrew (Aussie Sapphire) can resurface it.


Sanding is a bit messy as you get heaps of fine black powder resembling photocopy toner.


regards
Flash
Yours Sincerely
Flash (Gordon)

Aussie Sapphire

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Re: faceting
« Reply #9 on: March 31, 2019, 04:45:04 PM »
Andrew (Aussie Sapphire) can resurface it.

Yes - Darksides can be resurfaced if they get dinged.  Let us know if you want a quote.

cheers
Leah
Aussie Sapphire - The Lapidary Warehouse

Bucket

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Re: faceting
« Reply #10 on: April 02, 2019, 08:27:43 PM »
Thanks for that Leah, now that I know that I'll be in contact, I'm assuming that it's financially suitable to get them re-surfaced. I did enjoy using it before I damaged it.
Common sense isn't exactly common

Dihusky

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Re: faceting
« Reply #11 on: April 05, 2019, 06:42:59 PM »
Quartz is one of those materials where each faceter has his/her own special mix.

To add my 'two bobs' worth, I polish quartz using 60k diamond on a pure tin lap running fast, having pre-polished using 8k on copper. Yes it squeaks and growls, but I've never had a failure and I use an LED work light which causes cat hairs or any other fault to scream at you. Couple of wipes across the lap with a little pressure and the facet is done.

I tried Cerium once and it was a disaster, never been back

swirly

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Re: faceting
« Reply #12 on: April 06, 2019, 09:17:09 AM »
ill try that as i have a tin lap.

MakkyBrown

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Re: faceting
« Reply #13 on: April 06, 2019, 12:06:36 PM »
Quartz is one of those materials where each faceter has his/her own special mix.

To add my 'two bobs' worth, I polish quartz using 60k diamond on a pure tin lap running fast, having pre-polished using 8k on copper. Yes it squeaks and growls, but I've never had a failure and I use an LED work light which causes cat hairs or any other fault to scream at you. Couple of wipes across the lap with a little pressure and the facet is done.

I tried Cerium once and it was a disaster, never been back
I do as well but 100k diamond on what I think is a tin tap, but not 100% sure. It just doesn't want to scratch anything. I also knurl the lap when I load it.
We are a family of 4 from Southern Tasmania.

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